{"product_id":"dopod-d810-replacement-battery-37v-2400mah-li-polymer","title":"35H00077-02M Dopod D810 Compatible Battery 3.7V 2400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDopod D810 \/ CHT9100 — 3.7V Li-Polymer Replacement Battery (35H00077-02M)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2400mAh Li-Polymer replacement battery for the Dopod D810, CHT9100, and 9100 smartphones. It replaces OEM part numbers 35H00077-02M, 35H00077-00M, and TRIN160. Fit the replacement when the original cell no longer holds adequate charge for calls, messaging, or app use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eD810 \/ CHT9100 \/ 9100 platform fit:\u003c\/strong\u003e\n    All three model numbers share the same battery bay dimensions, connector pinout, and BMS handshake voltage. One cell fits all three without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a D810 unit and confirmed the BMS accepted the charge handshake on the first cycle. Charge IC stepped through the correct CC\/CV stages without fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, run one full discharge-charge cycle with fast charging disabled. The fuel gauge IC in the D810 is calibrated to the original cell's discharge curve — giving it one uninterrupted cycle against the new cell lets the coulomb counter reset its reference before higher charge currents are applied.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Dopod D810\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe D810 relies on the fuel gauge IC to estimate remaining charge, but when a degraded or new uncalibrated cell hits a voltage cliff, the device shuts down before the gauge reaches zero. Under modem load or screen-on state, current draw spikes and the cell voltage drops sharply — faster than the fuel gauge expects. The BMS interprets this as an undervoltage condition and cuts power. One full discharge-charge cycle without interruption resets the coulomb counter and brings the shutdown threshold back in line with the new cell's actual discharge curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePercentage jumping erratically after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter fitting a replacement cell, the D810's fuel gauge IC still holds the learned discharge model from the old battery. The result is percentage readings that jump — sometimes skipping 10–15% in either direction — because the stored capacity map no longer matches the new cell. This is not a fault with the replacement cell. Discharge the phone completely until it powers off, then charge uninterrupted to 100% with the screen off. After that single cycle the coulomb counter recalibrates to the new cell and percentage reporting stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405149831258,"sku":"BWCS-DD810XL-1","price":27.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43405149864026,"sku":"BWCS-DD810XL-2","price":31.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43405149896794,"sku":"BWCS-DD810XL-3","price":34.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DD810XL-big.webp?v=1779370298","url":"https:\/\/batteryweb.com\/products\/dopod-d810-replacement-battery-37v-2400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}